Explore Your Data with Playgrounds使用演练场探索您的数据

MongoDB Playgrounds are JavaScript environments where you can prototype queries, aggregations, and MongoDB commands with helpful syntax highlighting.MongoDB Playgrounds是JavaScript环境，在这里您可以通过有用的语法高亮显示来原型查询、聚合和MongoDB命令。

MongoDB Playgrounds provide intelligent autocomplete for:MongoDB Playgrounds为以下各项提供智能自动完成功能：

• The Mongo Shell API
• MongoDB keywords, operators, aggregation stages, database, collection, and field names.MongoDB关键字、运算符、聚合阶段、数据库、集合和字段名称。
• Any JavaScript variables or keywords.任何JavaScript变量或关键字。

You can save playgrounds in your workspace and use them to document how your application interacts with MongoDB. 您可以将演练场保存在工作区中，并使用它们来记录应用程序如何与MongoDB交互。MongoDB for VS Code interprets files with the .mongodb.js extension as playgrounds.MongoDB for VS Code将带有.mongodb.js扩展名的文件解释为演练场。

Starting in version 0.11.0 the default file extension for MongoDB Playgrounds files is .mongodb.js. 从0.11.0版本开始，MongoDB Playgrounds文件的默认文件扩展名是.mongodb.js。Previous versions of MongoDB Playgrounds use the default file extension .mongodb. MongoDB Playgrounds的早期版本使用默认的文件扩展名.mongodb。MongoDB Playgrounds support both file extensions.MongoDB Playgrounds支持这两种文件扩展名。

MongoDB for VS Code splits your Playground window to display your Playground Result in the right-side pane. You can perform one of two actions on the result depending on the query you ran in the Playground.MongoDB for VS Code拆分您的“演练场”窗口，在右侧窗格中显示您的“演练场结果”。根据在演练场中运行的查询，可以对结果执行两个操作之一。

• You may save any Playground Result to a file.您可以将任何“演练场结果”保存到文件中。
• You may edit any JSON document that MongoDB for VS Code returns in the Playground Result from a findOne or find query.您可以编辑MongoDB for VS Code在findOne或find查询的“演练场结果”中返回的任何JSON文档。

  MongoDB for VS Code returns these results in JSON format with JSON syntax highlighting. Each JSON document has an Edit Document link at its top.MongoDB for VS Code以“JSON”格式返回这些结果，并突出显示“JSON”语法。每个JSON文档的顶部都有一个“编辑文档”链接。

  1. Click Edit Document at the top of the document you want to edit.单击要编辑的文档顶部的“编辑文档”。

     MongoDB for VS Code opens this one JSON document in a new window as an editable document.MongoDB for VS Code在一个新窗口中将这一个“JSON”文档作为可编辑文档打开。

  2. Make any changes you need.做出你需要的任何改变。
  3. Press Ctrl+S (Cmd+S on macOS) to save those changes in the database.按Ctrl+S（macOS上的Cmd+S）将这些更改保存到数据库中。

Run a Playground运行演练场

To run a playground, click the Play Button in VS Code's top navigation bar. 要运行演练场，请单击VS Code顶部导航栏中的“播放”按钮。Your playground runs against the deployment specified in your active connection.您的演练场与活动连接中指定的部署背道而驰。

Connect to a Deployment from a Playground从演练场连接到展开

If MongoDB for VS Code is not connected to a MongoDB deployment, you can specify a connection string for the deployment you want to run your playground against.如果MongoDB for VS Code未连接到MongoDB部署，则可以为要运行您的演练场的部署指定连接字符串。

If you have a playground file open in Visual Studio Code and do not have an active connection, MongoDB for VS Code displays Click here to add connection at the top of your playground.如果您在Visual Studio Code中打开了一个演练场文件，但没有活动连接，则MongoDB for VS Code将在演练场顶部显示“单击此处添加连接”。

1. Click this link to open the connection string dialog.单击此链接打开连接字符串对话框。
2. Enter the connection string for the deployment you want to run this playground against.输入要运行此演练场的部署的连接字符串。
3. Press Enter.按Enter键。
4. Run your playground.运行演练场。

Note

When you connect to a deployment through the playground connection dialog, that connection is added to your MongoDB for VS Code Connections list.当您通过演练场连接对话框连接到部署时，该连接将添加到MongoDB for VS Code“连接”列表中。

Run Selected Lines of a Playground运行演练场的选定行

If you select a section of your playground, you may optionally run only the selected portion. 如果您选择了演练场的一部分，您可以选择只运行选定的部分。You may run either a single line or multiple lines of your playground.你可以在演练场上运行一行，也可以运行多行。

MongoDB for VS Code shows the Run Selected Lines from Playground link immediately above your selected section. MongoDB for VS Code在您选择的部分正上方显示“ 运行演练场中的选中行”链接。Click this link to test and troubleshoot specific lines or sections of your playground.单击此链接可测试和排除演练场上特定线路或部分的故障。